Performance is quite a broad topic. In which specific aspect are you not seeing better performance: loading data, rendering reports, anything else? What is the change that you made to make better performance? Are you sure the performance decrease comes from the LASR service? It could be from network, as an example.
Furthermore, the logs you are showing us are from a single node, and a single process.
In addition to above, I would say distributed SAS systems work in general (but not necessarily) better, when the distributed system is large, but not every node is too large. 8 or 16 physical core nodes are really optimal, and then it is important to keep a determined CPU/RAM ratio. It would seem better more nodes with less size than less nodes of larger sizes, in order to work with more data optimally.
In any case, I would say your best contact now is SAS Technical Support or your SAS representative, in order to take this discussion to the next level. There is no one but SAS itself who can give you the best recommendations when you wnt to achieve best performance.